In relation to a system which effects one-to-many authentication using biometric information; e. The method may be implemented in the kernel of an operating system and may include receiving at least one request regarding at least one designated device of a plurality of devices from at least one application program. A second layer of the high hardness and high modulus of elasticity material combined with the added metal is applied to the first layer, resulting in a coating system wherein the second layer has a modulus of elasticity and hardness greater than the modulus of elasticity and hardness of the first layer. Then, sending test messages to UI elements in the AUT includes sending corresponding test messages such as menu select, sub-menu select, check box select, text box fill, or variable fill command messages. The die are positioned in the substrate center and are coupled to the substrate first side.